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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "core/paint/FirstMeaningfulPaintDetector.h" | 5 #include "core/paint/FirstMeaningfulPaintDetector.h" |
| 6 | 6 |
| 7 #include "core/css/FontFaceSet.h" | 7 #include "core/css/FontFaceSet.h" |
| 8 #include "core/dom/TaskRunnerHelper.h" | 8 #include "core/dom/TaskRunnerHelper.h" |
| 9 #include "core/fetch/ResourceFetcher.h" | |
| 10 #include "core/paint/PaintTiming.h" | 9 #include "core/paint/PaintTiming.h" |
| 11 #include "platform/instrumentation/tracing/TraceEvent.h" | 10 #include "platform/instrumentation/tracing/TraceEvent.h" |
| 11 #include "platform/loader/fetch/ResourceFetcher.h" |
| 12 | 12 |
| 13 namespace blink { | 13 namespace blink { |
| 14 | 14 |
| 15 namespace { | 15 namespace { |
| 16 | 16 |
| 17 // Web fonts that laid out more than this number of characters block First | 17 // Web fonts that laid out more than this number of characters block First |
| 18 // Meaningful Paint. | 18 // Meaningful Paint. |
| 19 const int kBlankCharactersThreshold = 200; | 19 const int kBlankCharactersThreshold = 200; |
| 20 | 20 |
| 21 // FirstMeaningfulPaintDetector stops observing layouts and reports First | 21 // FirstMeaningfulPaintDetector stops observing layouts and reports First |
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| 125 if (m_provisionalFirstMeaningfulPaint) | 125 if (m_provisionalFirstMeaningfulPaint) |
| 126 m_paintTiming->setFirstMeaningfulPaint(m_provisionalFirstMeaningfulPaint); | 126 m_paintTiming->setFirstMeaningfulPaint(m_provisionalFirstMeaningfulPaint); |
| 127 m_state = Reported; | 127 m_state = Reported; |
| 128 } | 128 } |
| 129 | 129 |
| 130 DEFINE_TRACE(FirstMeaningfulPaintDetector) { | 130 DEFINE_TRACE(FirstMeaningfulPaintDetector) { |
| 131 visitor->trace(m_paintTiming); | 131 visitor->trace(m_paintTiming); |
| 132 } | 132 } |
| 133 | 133 |
| 134 } // namespace blink | 134 } // namespace blink |
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